Planing-machine.



No. 686,428. 'Patented No'v. l2, |901. J. n. THOMAS.

PLANING MACHINE. (Application filed Mar. 5, 1900.)

(No Model.)

PzTEns no, mom-uwe.. WASHINGTON. o. c.

2. I t w w. I h S m P t w w n N. S 4 d e Ll n .8, t a P E@ anw AH, Cr. MAM mmm Gm ..Nn DnNrm .Aw .JLM Pm .AV 8. 2 4 6., J 8. H, 6 o M u (No-Model.)

J. R. THOMAS.

PLANING MACHINE.

(Application led Mar. 5, 1900.)

Patented Nov. I2, IQDI.

4 Sheets-Sheet 3.

No. 686,428. Patented Nov. |2, |9o|.

-J. R. THOMAS. 'PLANING MACHINE. (Application 'led Mar. `5, 1900.)

(Illa Model.) 4SI'1eetea--Sheet-4e .UNITED STATES PATENT' @FFM/3R.

JOHN R. THOMAS, or CINCINNATI, OIiIO,'ASSIGNOR To J. A. -FAY a ECAN COMPANY, OF CINCINNATI, OHIO, A, CORPORATION or WEST VIRGINIA.

pLAmNo-MACHINE.

SPECIEIGATIQN forming part of Letters Patent No. 686,428, dated November 12, 1901. A Application filed March 5, 1900;. Serial No. 7,296. (No model.)

To all whom, t may concer-n: A

Be it known that I, JOHN R. THOMAS, a citizen of the United States, residing at Cincin nati, in the county of Hamilton and State of Ohio, have invented certain' new and useful Improvements in Planing-Machines, of which the following is a specification.

It is the object of my invention to provide a planing-machine adapted to act on the stock xo during the passage of the same through the' machine by means of rotary cutters and stationary cutters in such manner that a highlysurfaced product may be obtained. y

My invention consists in providing in a ma- I5 chine ofthe character described a pair of horizontally-disposed rotary cutter-heads adapted to reduce the vstock to a thickness andVV a stationary or fixed knife planing device for providing the stock with a highly-finished zo surface, to which the stock is fed after being operated upon by the pair of horizontally-` disposed cutterheads; further, in ,supplel menting the above arrangement by a pair of vertically-disposed cutter-heads for planing or tonguing and grooving the edges of the stock with a stationary or fixed knife cutting device to either side of the stockoperating upon the stock after leaving the vertically-disposed rotary cutter-heads. The object of this 3o arrangement of cutters is to first reduce the stock to thickness or to a width by means of rotating cutter-heads.

In rotating cutterheads the stock is reduced by means of knives attached toa plurality-sided cutter-head, the cutter-head re- Volving at a high rate of speed with each knife as it passes the stock, scooping out a portion thereof taking the form of a chip; but the action of the cutter is always in the 4o circle in which itswings, and each successive cutter I[fakes out an additional chip as thecutter-head swings and the feeding-rolls of the machine advance thestock; but each time a cutter cuts itis always on the 'circle of the swing of the cutter, and by the time the next succeedingcutterwillhave swungsufticiently to reach the stock the stock will also have advanced, and the cutter then cutting on the circle of its swing leaves a slight ridge between 5o its out and the cut of the cutterin advance of it. In practice the cutter-heads are rotated at a high rate of speed, and each cutter-head is usually provided with two or more cutters. The feed of the stock through the machine is also more or less rapid, in practice ranging all the wayfrom eighteen to about forty feet per minute to produce comparatively good stock in hard wood. The greater the speed of feed 4the farther the `stock will advance through the machine between the cut of each successive cutter on the cutter-head and the more perceptible will be the ridge left between each two cuts, depending on the ratio of feed.

There is a limit to the speed at which a cutter-head can be Successfully rotated in practice, and consequently la limit to the rate of feed through va machine employing rotary cutter-heads to provide the stock with an apparently smooth surface, each successive cut,

Vhowe`ver,being alwaysperceptible in the product, showing the more plainly the greater the tion. In order to avoid these objections,there fore, and to provide a machine capable of producing a perfectly plane smooth surface at a greatly-increased rate of feed, I supplement the horizontal rotary cutters with Stationary or iixed knife planing devices acting upon the stock after the rotary cutters have reduced the stock to thickness and adapted to take a thin shaving off of the face side of the stock, thereby providing the stock with a perfectly plane smooth face free of' ridges and enabling the stock to be passed 'through themaehine at a greatly-increased rate of feed, while producing a better product. I prefer to mount the horizontal stationary or 'fixed knives in a loOX,Which may be inserted into the machine, and prefer to make the position of this box the point with reference to which all other agencies of the machine are adjusted.

My invention consists,therefore, further, in providing a feeding-in table in advance of the lower outterhead, adjustable to raise and IOO . a thickness, and arranged to then direct the tions, boxes, and shaft.

stock against a series of rigidly-positioned su pporting andguiding agencies, both above and below and to one side, forming a die for the stock, and while passing therethrough subjecting it to the act-ion of fixed knife cutting agencies.

My invention consists, further, in the parts and in the construction, arrangement, and combinations of parts hereinafter more fully described and claimed.

In the drawings, Figure 1 represents a plan View of my improved device with the ends of the frame broken away,with the upper cutterhead also broken away for better illustration. Fig. 2 is a side elevation of my improved device. Fig. 3 is a central longitudinal section of the lower cutter-head and saddle broken awayat the middle. Fig. 4 is a detail in crosssection on the line z s of Fig. 3. Fig. 5 is a detail in cross-section on the line e yn of Fig. 3. Fig. G is a detail in side elevation representing the adjustable feeding-in table before the cut of the lower cutter-head. Fig. 7 is a detail in cross-section on the line w w of Fig. 6. Fig. Sis a cross-section of the pressure device for the horizontal fixed knives on the line of Fig. 2, showing the roll-sections and knife-box in side elevation. Fig. 9 is a centralhorizontal cross-section of the roll-sec- Fig. 10 is a detail in section on the line yu u of Fig. 8. Fig. 1l is a side elevation of the side-cutting agencies and pressure device therefor, taken from the middle of the machine. Fig. 12 isa detail in section on the line y y of Fig. 11.

A represents the frame of the machine, into or through which the stock is driven by suitable feeding devices, as by means of feedingrolls B B' B2 B3, driven in any suitable manner from a suitable source of power. At the feeding-in end of the machine I prefer to mount an upper horizontal cutter-head C and a lower horizontal cutter-head Cl. The cutter-head C is rotatively mounted in bearings 1 of a housing 2, adjustable up and down on uprights 3 by means of screw-shafts 4, one at each side of the machine, which may be interconnected by a shaft 5 and gears G and 7. The upper cutter-head may be held in rigid `relation with the u prights by means of T-bolts and nuts 8, connecting theupright and housing. A chip-breaker 9 is provided in advance of the cutter-head and a pressure-bar 10 after the cutter-head. The lower cutter-head is supported by a saddle 11, provided with sides 12, adjustable in ways 13 in the frame up and down, by means of set-bolts 14, adapted to be held in place by means of jam-nuts 15. The saddle 11 has ways 16, in which a cutterhead yoke 17 may slide longitudinally. The yoke carries bearings 18 for the cutter-head. It has a screw 19, which takes through a threaded aperture 20 in the saddle and has a bearing 21 in the yoke, by means of which the yoke is given longitudinal movement with relation to the saddle. The yoke also carries a handle or grip 22, by means of which the yoke may be pulled longitudinally with relation to the saddle and through an opening 23 in the side of the frame. The saddle carries a bearing 24, in which I journal one member 25 of a clutch 26. This bearing may be on a bracket 24 of the saddle extending outwardly from the frame to allow for passage of the belt operating the cutter-head. The other member 0f the clutch 27 is carried by the shaft 28 of the cutter-head. The clutch may take the form of a cone-and-cup clutch, the member 25 being the cup and the member 27 the cone. They may be interconnected by projections or dogs 29, preferably tapering to form more intimate union between the same. When the screw 19 is turned to force the cutter-head yoke inwardly, the members of the clutch make intimate contact, whereby the cutter-head shaft, with the cup-shaft 30 in the bearing 24, will form a rigidly-connect` ing shaft having three bearings, with the pnlley 31 for driving the cutter-head, which is preferably formed by the outer periphery of the cuplocated between two bearings in close relation with each other to afford smoothness of operation and at the same time allow a removal of the cutter-head for the purpose of sharpening and readjusting the cutters without removing the driving-belt for the same from its pulley, but allowing its pulley and driving-belt to remain in position. The screw 19 may extend asubstantial distance into the frame or only slightly, as may be desired. A clamp 32, which takes through a slot 33 in the saddle side, may hold the saddle rigid with relation to the frame after adjustment. A pressure-bar 34 after the out of the lower cutter-head may be provided. A pressure plate or roll 35 takes above the lower cutterhead for holding the stock to its work. lt may be given vertical adjustment on a standard 3G by means of a hand-wheel 37 and suitable adjusting-screws, shafts, and gears, and the standard may be arranged to swing upwardly out of the way to expose the cutterhead.

In advance of the lower cutter-head I provide an adjustable table 51. The table may have lugs 52, sliding in ways 53. The ways may be arranged in the frame orin a casting 54, bolted to the frame by means of bolts 48,

IIO

passing through slots 49 in flanges on the castings. Each casting can be adjusted longitudinally of the frameby reason of thebolt passing through a slot to line up the tablet'. e., cause the inclined ways to have the proper relation toward each other for this purpose. A plate 55 is adapted to b e bolted above the lug on the table after the latter has been seated on the way, so as to give it rigidity, both up and down and sidewise. The raising and lowering of the table .may be effected by an adj usting-screw 56, screwing into an internally-threaded lug 57 under the table, with a gear 58 at the end of the adjusting-screwconnecting with a gear 59 on the shaft 60, the latter having a hand-wheel 6l for turning it. The ways 53, are preferably inclined, so as to raise and lower the plane of the table andat the same time bring it toward and from the place of cut of the cutter-head. It has a toe-plate 62, separately adjustable to and from the'vertical plane of the cutterhead, as by means of bolts 63 taking through slots 64 in the toe and into the table for fastening the toe in adjusted position with relation to thevcutter-head, thereby bringing the edge of the table close to the cut of the cutter-head. A

In my improved device the stock is preferably reduced to thickness by the upper cutter-head, the feeding-in table acting as a support for the stock while being operated upon by theuppercutter-head, with the feeding-in table adjustable to vary the depth of cut taken by the lower cutter-head. The stock after it has been operatedupon by both of these cutter-heads is'reduced to a thickness, with each side thereof a substantially plane surface, so that when it reaches the xed knives, hereinafter described, the pressure agency above the fixed knives may exert a uniform pressure on the stock, so as to prevent marking of the stock by the fixed knives, and a tendency to gouge by the fixed knives, and to consequently produce stock with a superior surface and which after it leaves the machine Vhas a uniform and even thickness throughout. After it has been so reduced to a substantially plane surface the stock is ready for operation by the succeeding cutting agencies following in the machine.

Immediately after the lower cutter-head I provide stationary or fixed knife cutting devices, which I prefer to mount in a detachable cutter-box 7l, readily removable from the machine. The cutter-box 7l is supported in ways 72, rigid with relation to the frame, as on cross-girths 73. The cutting agencies for thev fixed knife cutting devices are preferably sharp beveled-edge `knives 70, secu red in the cutter-box diagonally of the frame and direction of feed of the stock and also diagonally to a vertical plane. The cutting edge of lthe knife is stationarily presented to the stock as it advances, the knives being secured in the box in suitable manner, as by means of bolts taking through slots in the knives for holding thestock to the latter. .s

The frame, at each side thereof, is provided with a standard 81, which may be connected so as to form a yoke. A pressure-device frame 82 is adjustable up and down in the yoke to and kfrom the fixed knives, as by means of a screw-shaft 83 at each side of the yoke, collared with reference to the yoke and 'screwing into an internally-threaded lug 84 on the pressure-device frame. The screw.- shafts support gears 85, meshing with gears 86`on a horizontal shaft 87, which may also carry a hand-wheel 88 for turning the same. One'or more transverse shafts or rods 91, extending diagonally of the frame and of the direction of feed, may be supported by the pressure-device frame, preferably one for each fixed knife. This shaft or rod is preferably nonrotatable and has taking thereabout a plurality of sleeves 92, having diagonal bores to take about the shaft, with a spline 93 interposed between the rod and sleeves to make the two relatively stationary. The sleeves are provided with externally-journaled faces Y nal-faces, with their peripheries arranged to make contact with the stock and extending at right angles to the length of the machine and to the direction of feed of the stock and forming a substantially continuous bearing upon the stock transversely of the machine and extending diagonally across the same above the cutting edges of the stationary or fixed knife. In a machine of this character the stock is fed through the machine at a very high rate of speed, and the stationary or fixed knives are arranged diagonally across the same, so as to take a shearcut off the stock. It is necessary in order to do smooth work that substantial pressure be exerted on the stock, so that the stock may be forced against the cutters firmly, so that it may not lrise whenever hard or knotty places in the stock are being cut. I have also found it desirable to have a substantially continuous pressure exerted transversely o f the machine above the diagonally-arranged fixed knives, so that there may be no points transversely of the machine where no pressure is exerted. Any substantial space left between the sections of the rolls would be noticeable on the stock.

I provide each end of the transverse rods IOO IIO

91 with a box 95, taking into Ways 96 in the pressure-device frame and preferably having longitudinal bore with an inner diagonal suitable yielding pressure device may be pro- Y ally smooth product.

vided for yieldingly holding the pressurerolls-in normal position. They may be intei-posed between the roll-boxes 95 and a yoke 99. Set-bolts 100 may regulate the tension of the springs, and jam-nuts hold the setbolts in adjusted position, with washers intei-posed between the bolts and springs. The spring or yielding pressure agency may be dispensed with,the set-bolts taking direct against the boxes, making a pressure device rigid with relation to the knives and frame. When thus constructed, my improved device presents a fixed and unyielding upper line of contactfaces, by which the stock is guided after it leaves the rotary horizontal cutter-heads, which reduce it to a thickness, with the lower line of guiding-faces and the side gage for the stock also rigid, forming, in effect, a die through which the stock is forced by the feeding agencies, determining the line of cut with great accuracy and producing an exception- The rotating cutterhead leave slight ridges or marks by the knives, being-tire more perceptible the faster the rate of feed of the stock, all of which are removedxb'y the fixed knives and the stock left perfectly smooth and plane, enabling a much higher rate of feed of stock to be maintained, with a greater perfection in product, than in the old constructions, in which rotary cutter-heads only are employed, the increase in speed of feed being from one hundred to three hundred per cent. or more, and the stock being first reduced to a thickness by rotary cutter-heads cutting at top and bottom of sam errand the mahiie being provided with an adjustable feeding-in table before the lower cutter-head the stock is reduced to an even thickness throughout, insuring an even pressure above the fixed knives and producing superiority in product.

The stock is next preferably operated upon by a pair of vertically-disposed cutter-heads 101, mounted on spindles 102, journaled in bearings 103, and operated by pulleys 104. They may also be provided with chip-breakers and are given transverse adjustment by means of adjusting-screws 106 in any ordinary way. These vertically-disposed rotary cutter-heads are for the purpose of preparing the stock for fixed knife devices 111, operating from right and left, which perform their cutting operation after the vertical rotary cutter-heads. The rotary cutter-heads reduce the stock to substantially correct width,with

'l will the fixed knife devices operating on the board thereafter to provide the edges of the board with a perfectly smooth surface. The upright xed knives are secured at each side of the machine in a slide 116, in which a knifebox 117 may be inserted. The knife-box may be omitted, and the fixed knife may be fastened direct to the slide. An adjusting-screw 11S is provided for each slide for adjusting it transversely of the machine. The knifebox is secured in the slide by means of a pin 119, taking into a hole 120, formed partly in the slide and partly in the knife-box. The pin has a flat side 121. When this flat side is coincident with the knife-box side, the knifebox may be removed, and when it is returned the pin is turned by means of handle 122. The manner of securing the fixed knife-blades is by having a bolt 123 take through a slot 124 in the blade into aninclined part 125. A reinforcing-plate may be interposed between the bolt-heads and the blade in the knifebox 71 where long knives are used. A transverse shaft or bar 126 preferably spans the machine ahead of the vertical cutter-spindles, as by being mounted in lugs 127. The bar 126 has an arm or arms 129 projecting therefrom, with the arm sleeved about the shaft by means of a sleeve 130 and arranged to swing about or with the bar. At its otherend the arm is provided with seat 131, at which it is connected with the slide 116, as by means of having a pivoted bolt 132 taking into a slot in the arm, with a nut 134 for fastening the arm and slide together. A pressure-bar 137 is sustained by the arm and is adapted to take against the stock, respectively, between the vertical spindled cutter-heads and -the vertically-disposed fixed knife devices. I prefer to make the connection between the pressure-bar and the arm by means of an extension 138 on the bar, slidable in ways 139 in the arm and adjustable therein by means of a screwshaft 140, taking into an internally-threaded aperture or lug 141 on the arm, the screw-shaft being shouldered on the extension.

Any desired number of feeding-rolls may be employed, and they may, if desired, be all placed at the feeding-in end of the machine.

It is obvious that changes may be made in the constructions I have preferred to show without departing from the spirit of my invention.

I claimt 1. In a planing-machine, the combination of upper and lower horizontally-disposed rotary cutter-heads cutting in advance to reduce the stock to a uniform thickness, with one of the horizontally-disposed rotary cutter-heads cuttin gin advance of the other,with a horizontally-disposed stationary-knife cutting device cutting thereafter, substantially as described.

2. In a planing-machine, the combination of upper and lower horizontally-disposed rotary cutter-heads cutting in advance to reduce the stock to a uniform thickness and IOO IIO

surface, with a horizontally-disposed stationary-knife cutting device cutting thereafter, with vertically-disposed rotary cutter-'heads for the edges of the stock and vertically-dis -posed stationary-knife cutting devices'arranged to operate upon the stock in the order named, substantially as described.

3. In a planing-machine, the combination of upper and lower'horizontally-disposed r0- tary cutter-heads cutting in advance to re-v -duce the stock to a uniform thickness, with one of the horizontally-disposed rotary cutter-heads cutting in advance of the other,with a horizontally-disposed iXed-knife cutting device cutting thereafter and a horizontallypositioned substantially continuous rotatable pressure agency opposite. thereto, substantially as described.

4. In a planing-machine,the combination of an upper rotary cutter-head cutting first, a lower rotary cutter-head cutting next, with a feeding-in table below the upper V'cutterhead and in advance of the lower cutter-head, with means for raising and lowering the same, and horizontally-disposed stationary-knife cutting devices cuttingafter the lower rotary cutter-head, and a pressure device therefor, substantially as described.

5. In a planing-machine, the combination of an upper rotary cutter-head cutting first, a lower rotary cutter-head cutting next, with -a feeding-in table below the upper cutterhead and in advance of the lower cutter-head, with means for raising and lowering the same, with an independent toe for the feeding-in table adjustable on the feeding-in table to and from the lower cutter-head, and horizontally-disposed stationary-knife cutting devices cutting after the lower rotary cutterhead, and a pressure device therefor, substantially as described.

6. In a planing-machine, the combination of an upper horizontal-ly disposed cutterhead, a feeding-in table thereunder, a horizontally-disposed lower cutter-head, inclined ways for supporting the feeding-in table with means for raising and lowering the table on the incline ways toward and from both cutter-heads simultaneously, an independent toe for the feeding-in table adjacentto the lower cutter-head, with means for permitting the adjustment of the toe on the table toward and from the lower cutter-head,v substantially as described.V Y

7. In a planing-machine, the combination of upper and lower horizontally-disposedrotary cutter-heads cutting in advance to reduce the stock to a uniform thickness, with a horizon tally disposed stationary knife cutting device cutting thereafter, with a pulley in line with the lower cutter-head for rotating the same, and a clutch interposed between the pulley and the cutter-head, and means for longitudinally removing the cutter-head with its spindle and bearings, without disarranging the pulley,substantially as described.

8. In a planing-machine, the combination of a frame, a rotary cutter-head, a yoke inwhich the cutter-head is journaled slidable with relation to the frame, a bearing rigid with relation to the frame, with means for rotating the cutter-head journaled in the bearing, and a clutching device operatively v interposed between said means and the cutterhead for allowing the longitudinal movement ofthe cutter-head yoke without disarranging the means for` rotating the cutter-head, 'substantially-as described. l

9. In a planing-machine, the combination of a frame, a saddle adjustable thereon, a cutter-head yoke slidable longitudinally with relationto the saddle, a cutter-head journaled in the yoke, with a bearing on the saddle, a

pulley for o peratin g the cutter-head journaled in the bearing, with a clutching device operatively interposed between the pulley and the cutter-head, substantially as described.

l0. In a planing-machine, the combination of a frame, with a saddle adjustable thereon, a yoke slidable longitudinally of the saddle, a bearing at each end of t-he yoke with a cuttenhead journaled in the'bearings, a bearing IDO 12. In a planing-machine, the combination of upper and lower horizontally-disposed rotary cutter-heads cutting invadvance to reduce the stock to a uniform thickness, with a horizontally-disposed stationary-knife cut- IIO ting device comprising .a stationary knife set Y` diagonally of the feed-rolls cutting thereafter, with a diagonal pressure agency for the latter having substantially continuous rotatable pressure-faces, substantially as described.

. 13. In a planing-machine, the combination .of a frame, a diagonal bar, sleeves taking thereabout having diagonal bore and journalface extending longitudinally of the sleeve and diagonally to the shaft, with roll-sections taking over the sleeves, to make a substantially continuous transverse bearing on the stock, substantially as described.

14. In a planing-machine, the combination of a frame, a series of roll-sections, each rollsection having a bearing-face for the stock, with the bearing-faces projecting in parallel lines, with a diagonal bore within each sec` tion, and with the sections arranged diago- A nally of the frame and mounted upon a single support taking therethrough and forming a substantially continuous pressure agency, substantially as described.

sis

.of a diagonal bar with sleeves having diagonal bore taking thereabout and secured fixedly with relation to the bar, with roll-sections khaving bearings diagonal te the sleeve-bore,

with their cont-acting faces with the stock in a common horizontal plane and theirside faces arranged in parallel lines in advance of each other and forming a continuous pressure agency, substantially as described.

17. In a planing-machine, the combination of a diagonal bar with sleeves having diagonal bore taking thereabout and secured fixedly with relation to the bar,with roll-sections having bearings diagonal to the sleeve-bore, with their contacting faces with the stock in a com mon horizontal plane and their side faces arranged in parallel lilies in advance of each other and forming a continuous pressure agency, and boxes for each shaft, stationary with relation thereto, substantially as described.

1S. In a planing-machine, the combination of a diagonal bar with sleeves having diagonal bore taking thereabout and secured fixedly with relation to the bar, with roll-sections having bearings diagonal to the sleeve-bore,

with their 'contacting faces with the stock in a common horizontal plane and theirsidefaces arranged in parallel lines in advance of each other and forming a continuous pressure agency, boxes for each shaft, stationary with relation thereto, a spring or similar means for yieldingly holding each box in normal position, substantially as described.

19. In a planing-machine, the combination of a frame, a stationary cutting-knife-extending transversely of the frame but diagonally thereto, a diagonally transversely extending bar in substantially the vertical plane of the cutting edge of the knife with a series of pressure-roll sections having parallel contactfaces for the stock extending at substantially right angles to the frame and arranged to rotate about the shaft or rod with their contactfaces maintained in parallel lines and substantially continuous, substantially as described.

20. In a planing-machine, the combination of a frame, a rotary cutter-head, a yoke in which the cutter-head is journaled slidable with relation to the frame, a bearing rigid with relation to the frame, with means for rotating the cutter-head journaled in the bearing, and a clutching device operatively interposed between said means and the cutter-head for allowing thelongitudinal movement of the cutter-head yoke without disarranging the means for rotating the cutter-head, with pressure devices for holding the stock against the cutter-head, substantially asdescribed.

21. In a planing-machine, the combination of a rotary side cutter-head and a stationaryknife cutting device arranged to each side of the stock passing through the machine, a slide in which the stationary-knife cutting device is mounted, with means for the lateral adjustment of the slides and the rotary cutterheads, with au arm swinging upwardly with relation to the slides and movable transversely with a side cutting agency, and means for rigidly securing the arm with relation thereto, and a pressure-bar extending longitudinally between the rotary cutter-head and stationary-knife cutting device at each side of the stock, respectively, with means for adjusting the pressure-bar in the arm, substantially as described.

22. In a planing-machine, the combination of a rotary cutter-head and a stationary-knife cutting device mounted to each side of the stock passing through the machine, means for adjusting the rotary cutter-heads transversely of the machine, a slide for each of the stationary-knife cutting devices, with means for transversely adjusting the slide, a swinging arm supporting an adjustable pressurebar extending longitudinally between the cutters swinging away from the cutters to expose the same, with means for securing the free end of the arm to the slide to hold the pressure-bar in rigid position and move the same laterally with the slide, substantially as described.

23. In a planing-machine, the combination of upper and lower horizontal rotary cutterheads cutting in advance with a horizontallydisposed stationary knife device cutting thereafter, With a vertically-disposed rotary cutter-head and a stationary-knife cutting device for each edge of the stock, arranged to operate upon the stock in the order named, with a shaft or rod extending transversely of the machine and an arm or arms swinging therefrom and sliding thereon, a pressure-bar slidable in the arm and adjustable up and down therein and located beyond the horizontal stationary-knife cutting devices between the vertically-disposed rotary cutter-heads and the vertically-disposed stationary-knife cutting devices, respectively, with a slide for each of the vertically-disposed stationaryknife cutting devices, with means for rigidly securing the free ends of the swinging arms with relation thereto and permitting the lateral adjustment of the latter with the former, substantially as described.

In testimony whereof I have signed my name hereto in the presence of two subscribing witnesses.

JOHN R. THOMAS. `Witnesses:

PARKE S. JOHNSON, PHILIP W. TozzER.

IOO

IIO 

